Jennifer Aniston’s neighbors are snickering about a prankster who left a blanket of bologna meat on top of her boyfriend Justin Theroux’s BMW motorcycle early yesterday morning as it was parked outside of the actress’ West 12th Street apartment.

A neighbor walking a dog early in the morning spotted up to 25 slices of “what clearly was bologna” stuck to the seat, the wheels, handlebars, muffler and engine at about 8 a.m. yesterday morning. But shortly after, the bike was cleaned off.

While the identity of the prankster remains a mystery, “I got the impression it was some weird message, like, ‘You’re full of bologna,’ ” the neighbor told us. “The bike was in otherwise in fine condition.”

Aniston and Theroux, who met on the set of their movie “Wanderlust,” moved into a Hollywood pad in August. But they have recently been spending time at the West Village apartment she bought in May, combining two apartments on different floors to create a 2,700-square-foot duplex.

Neighbors say Theroux’s bike has been parked outside Aniston’s apartment almost every day this week, and the pair have been repeatedly seen strolling around the city. The happy couple have attracted a lot of attention from photographers, causing a commotion which has unsettled some locals.

Aniston’s rep said, “There are paparazzi outside their apartment 24/7. Don’t you think they would have photographed the person doing it, if indeed this actually happened, which I do not know for sure.”

Aniston has made an effort to show that former husband Brad Pitt’s recent comments about their marriage haven’t ruined her happiness. Pitt told Parade, “I wasn’t living an interesting life myself … I think that my marriage [to Aniston] had something to do with it. Trying to pretend the marriage was something that it wasn’t.” Pitt later clarified that he was talking about himself, not Jen.